PCSK9 Antibody [M4L6]

적용: 반응성:Human

Lane 1: A431
Lane 2: HepG2

실험 필수품

WB
This antibody can recognize both the precursor and mature forms of PCSK9, potentially resulting in double bands.

사용 정보

희석
WB1:1000-1:10000 IP1:30 - 1:50

응용
WB, IP

반응성
Human

출처
Rabbit Monoclonal Antibody

보관 완충액
PBS, pH 7.2+50% Glycerol+0.05% BSA+0.01% NaN₃

보관 (수령일로부터)
-20°C (avoid freeze-thaw cycles), 2 years

예측 분자량 관찰 분자량
74 kDa 62 kDa, 78 kDa
^*예측 분자량과 실제 분자량이 다른 이유는 무엇입니까? 다음과 같은 이유로 예측 분자량과 실제 단백질 분자량 간에 차이가 있을 수 있습니다.

양성 대조군	Human fetal liver; BxPC-3; A431; HepG2
음성 대조군

실험 방법

WB
Experimental Protocol: Sample preparation 1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes. 2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice.Add an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant; 5. Remove a small volume of lysate to determine the protein concentration; 6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice. Electrophoretic separation 1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations 2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.) Transfer membrane 1. Take out the converter, soak the clip and consumables in the pre-cooled converter; 2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer; 3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip"; 4. The protein was electrotransferred to PVDF membrane. ( 0.45 µm PVDF membrane is recommended ) Reference Table for Selecting PVDF Membrane Pore Size Specifications Recommended conditions for wet transfer: 200 mA, 120 min. ( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.) Block 1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes; 2. Incubate the film in the blocking solution for 1 hour at room temperature; 3. Wash the film with TBST for 3 times, 5 minutes each time. Antibody incubation 1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight; 2. Wash the film with TBST 3 times, 5 minutes each time; 3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour; 4. After incubation, wash the film with TBST 3 times for 5 minutes each time. Antibody staining 1277. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly; 2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system.

WB

Experimental Protocol:

Sample preparation

1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes.

2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice.Add an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant;

5. Remove a small volume of lysate to determine the protein concentration;

6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice.

Electrophoretic separation

1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations

2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.)

Transfer membrane

1. Take out the converter, soak the clip and consumables in the pre-cooled converter;

2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer;

3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip";

4. The protein was electrotransferred to PVDF membrane. ( 0.45 µm PVDF membrane is recommended ) Reference Table for Selecting PVDF Membrane Pore Size Specifications

Recommended conditions for wet transfer: 200 mA, 120 min.

( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.)

Block

1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes;

2. Incubate the film in the blocking solution for 1 hour at room temperature;

3. Wash the film with TBST for 3 times, 5 minutes each time.

Antibody incubation

1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight;

2. Wash the film with TBST 3 times, 5 minutes each time;

3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour;

4. After incubation, wash the film with TBST 3 times for 5 minutes each time.

Antibody staining

1277. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly;

2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system.

Datasheet & SDS

생물학적 설명

특이성
PCSK9 Antibody [M4L6] recognizes endogenous levels of total PCSK9 protein.

세포 내 위치
Cytoplasm, Endoplasmic reticulum, Endosome, Golgi apparatus, Lysosome, Secreted

Uniprot ID
Q8NBP7

클론
M4L6

배경
Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a serine protease that plays a critical role in cholesterol homeostasis by promoting the degradation of low-density lipoprotein receptors (LDLR), and its family members, including very low-density lipoprotein receptor (VLDLR), apolipoprotein E receptor 2 (ApoER2), and LDLR-related protein 1 (LRP1) reducing cellular uptake of LDL cholesterol, and thereby regulating plasma LDL levels. PCSK9 is encoded by the PCSK9 gene and consists of a signal peptide, a prodomain, a catalytic domain, and a cysteine- and histidine-rich C-terminal domain. It undergoes autocleavage in the endoplasmic reticulum for maturation and secretion. Predominantly expressed in the liver, PCSK9 is also found in tissues like the intestine, kidney, and brain. Its expression is modulated by cholesterol levels, being upregulated by high dietary or systemic cholesterol. Beyond lipid metabolism, PCSK9 impacts immune regulation by degrading major histocompatibility complex I (MHCI) proteins and contributing to inflammation and cancer progression, highlighting its significance in cardiovascular disease and oncology.

배경

Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a serine protease that plays a critical role in cholesterol homeostasis by promoting the degradation of low-density lipoprotein receptors (LDLR), and its family members, including very low-density lipoprotein receptor (VLDLR), apolipoprotein E receptor 2 (ApoER2), and LDLR-related protein 1 (LRP1) reducing cellular uptake of LDL cholesterol, and thereby regulating plasma LDL levels. PCSK9 is encoded by the PCSK9 gene and consists of a signal peptide, a prodomain, a catalytic domain, and a cysteine- and histidine-rich C-terminal domain. It undergoes autocleavage in the endoplasmic reticulum for maturation and secretion. Predominantly expressed in the liver, PCSK9 is also found in tissues like the intestine, kidney, and brain. Its expression is modulated by cholesterol levels, being upregulated by high dietary or systemic cholesterol. Beyond lipid metabolism, PCSK9 impacts immune regulation by degrading major histocompatibility complex I (MHCI) proteins and contributing to inflammation and cancer progression, highlighting its significance in cardiovascular disease and oncology.

참고문헌
https://pubmed.ncbi.nlm.nih.gov/34782856/

단백질 크기	PVDF 전이막 기공 크기
< 10	0.22
10-20	0.22
20-30	0.45
30-45	0.45
45-70	0.45
80-100	0.45
100-140	0.45
> 140	0.45

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단백질 크기	분리 젤 퍼센트
4-40	20%
12-45	15%
10-70	12.5%
15-100	10%
25-100	8%
60-210	5%